By what are two nucleotides held together? Is it dehydration condensation?

It's connected by phosphodiester bonds, but it can also be called dehydration condensation, and the upstairs ones are all wrong, and this is dehydration condensation, but it's not talked about in high school biology textbooks (maybe some high school teachers don't know, I just asked my college teachers) Almost all the connections in biology are dehydration condensation (except for hydrogen bonds), and only DNA ligases don't dehydrate and condense when they connect the broken DNA (that's what the genetic engineering chapter talks about) and they directly connect them together (because they are forcibly disconnected when they break it). Not hydrolysis)

There are two strands of DNA, and these two strands are complementary strands (i.e., complementary strands like A-T, G-C), vertically referring to the nucleotide connection on one strand, and transversely referring to the connection between the two strands.

1.The nucleotides are connected transversely by hydrogen bonds, 2 hydrogen bonds between AT(U) and 3 hydrogen bonds between GC.

2.Nucleotides are vertically between them, that is, on a stranded DNA molecule, to 3'5'Dihydrogen phosphate bonds are linked, and the water molecules are removed when this bond is formed.

3.These two sentences clarify the way in which the nucleotide, the basic unit of the DNA molecule, makes up DNA, and as for the difference you mentioned, I think it should be that you haven't understood these two bonds at the beginning, and you should understand the first two of them.

The nucleotides are bound together by phosphodiel bonds, and are also formed by dehydration (alcohol group + carboxyl group = ester bond + water), but dehydration condensation specifically refers to the formation of polypeptides by amino acids, which cannot be called dehydration condensation here. The nucleotides are linked laterally by hydrogen bonds.

It is connected by phosphodiester bonds, and the concept of dehydration and condensation comes from chemistry, and this concept is not explicitly proposed in high school biology, but it is only said that proteins are formed by dehydration and condensation, but conceptually, the condensation method of nucleotides belongs to dehydration and condensation, and the concept of dehydration and condensation does not specifically refer to the synthesis of proteins.

The nucleotides are held together by phosphodilipid bonds. Dehydration condensation is the way in which amino acids form polypeptides.

Dehydration condensation refers to the synthesis of proteins.

It is not related to the ligation of nucleotides.

The ligation of nucleotides is mainly done by base complementary pairing.

There is definitely dehydration condensation.

Monomers (amino acids, nucleotides, glucose, etc.) form corresponding multimers (proteins, nucleic acids, polysaccharides, etc.) and generally undergo dehydration condensation reactions.

It is dehydration condensation.

This one is judged according to the definition, you look at the definition of dehydration condensation, it is to take amino acid dehydration condensation as an example to illustrate -nh-co-, this way of binding. As long as it is this combination, it is a dehydration condensation.

Not only amino acids, but also nucleotides to form nucleic acids, and the formation of peptides are all dehydration condensation.

h₂n-r-cooh + h₂n-r-cooh → h₂n-r-co-nh-r-cooh + h₂o

General formula of amino acids: H N-R-Cooh (R stands for group, various amino acids can be different).

In the cell, the number of each amino acid is hundreds of hundreds, when amino acids form peptide chains, the order of different types of amino acids is ever-changing, the coiling, folding methods and the spatial structure formed by peptide chains are very different, therefore, the structure of protein molecules is extremely diverse. This is the reason why there are so many types of proteins in cells.

It is composed of the carboxyl group (-COOH) of an amino acid molecule and the amino group (-NH2) of another amino acid molecule, and at the same time remove a molecule of water, and connect the chemical bond (-NH-CO-) of two amino acid molecules called peptide bonds, and the compound formed by condensation is called dipeptide. The equation is as follows:

h2n-r-cooh + h2n-r-cooh → h2n-r-co-nh-r-cooh + h2o

General formula of amino acids: H2N-R-CoOH (R represents the group Various amino acids can be different).

Amino acids in cells.

The dehydration condensation is the process of forming peptide chains and then further forming proteins, while ribosomes are formed.

It is the only place where proteins are synthesized, so the dehydration and condensation of amino acids in the cell takes place only on ribosomes. and peptide bonds.

It is formed during the dehydration and condensation of peptide chains.

Many biochemical reactions that form biological macromolecules are formed by the formation of water condensation, such as the formation of the most commonly buried protein: the carboxyl group of an amino acid molecule.

COOH) is linked to the amino group (-NH2) of another amino acid molecule and loses one molecule of water at the same time, and this binding method is called dehydration condensation. 2 amino acid molecules form a peptide bond by dehydration condensation, 3 amino acid molecules form two peptide bonds by dehydration condensation, and so on, 10 amino acids will form 9 peptide bonds;

So imagine that if 10 amino acids form two peptide chains, how many peptide bonds will be formed? Just like there are 10 students lined up, if you line up in a line, there will be 9 intervals in the middle, if 10 people are divided into two teams, every 5 people in a team, there will be a few intervals, obviously there are 8, in the same way, if 10 amino acids form two peptide chains, 8 peptide bonds will be formed, and so on, you will summarize the formula of "the number of peptide bonds formed (the number of water molecules removed) = the number of amino acid molecules - the number of peptide chains".

The dehydration and condensation of amino acids in the cell is the process of forming peptide chains and then further forming proteins, and ribosomes are the only place where proteins are synthesized, so the dehydration and condensation of amino acids in cells is only carried out on the ribosomes of the leaky jujube. The Kaikai peptide bond is formed during the dehydration and condensation of the peptide chain.

No.

The first step in the dehydration and condensation of amino acids is the process of breaking the bond of 2 groups, that is, the amino group loses a -H, the carboxyl group loses a -OH, and then the peptide bond is formed.

The whole process needs to be endothermic and is a non-spontaneous process without a catalyst at room temperature.

Of course, you can add a catalyst while heated and make it react spontaneously, for example with ethylene glycol as a catalyst (but the synthetic stuff is often a bunch of mixtures).

In addition, it should be noted that the normal synthesis of amino acids on ribosomes is actually strictly speaking, and the whole process does not involve dehydration, or even a "water-added" reaction [because the water molecules thrown out by dehydration and condensation are not enough ...... consumed in the whole processWhat's going on is too complicated, it's not going to happen.

Dehydration condensation can only refer to the formation of polypeptides from amino acids. The No. 4 carbon decomposition of ribose is hRibose sugar is dehydrated and condensed with a base to form the compound ribonucleoside.

For example, the dehydration of two amino acids is condensation, and the dehydration and condensation of many amino acids is polymerization, which is generally called condensation in biology, and glucose is polymerized into starch, and the dehydration molecule is removed when this bond is formedThese two sentences clarify the way in which the nucleotides, the basic unit of the DNA molecule, make up DNA, nucleoside phosphate group = nucleotide nucleic acid = many nucleotides dehydrated and condensed.

Yes, the monomer of RNA is ribonucleotide. Can the process of polymerization of nucleotides into DNA be called dehydration condensation? 3 。

Of course not, 2 hydrogen bonds between at(u) and 3 hydrogen bonds between gc 2Between the nucleotides vertically, you should understand by looking at my first two items. I think you haven't understood these two keys at the beginning, 1

The nucleotides are connected horizontally by hydrogen bonds, so that a single strand of DNA is formed Two single strands of DNA are formed by hydrogen bonds formed between the bases, and finally form a double-stranded DNA is an inclusion relationship nucleic acid is broken down into Nucleotide is a unit of nucleic acid A nucleic acid is formed by the polymerization of many nucleotides 0 |Nucleic acids are biological macromolecules formed by the dehydration and condensation polymerization of many nucleotides The monomer divided into DNA and RNA DNA is deoxynucleotide, the former in ribosomes; The latter is in the nucleus. As for what difference you are talking about, 2011-10-28 nucleic acids five-carbon sugars nitrogenous bases phosphate nucleotide chain number DNA ? rna ?。

It's just that the h on the third carbon of the previous deoxynucleotide and the phosphoric acid group on the fifth carbon of the next deoxyribonucleotide undergo a dehydration condensation reaction to form 3, and many small molecules are combined into large molecules in a dehydrated condensation manner.